[Kamailio-Users] Media Bridge tips and hints

[Klaus Darilion]

also set mhomed=1

http://sip-router.org/wiki/cookbooks/core-cookbook/devel#mhomed

regards
kalus

Am 22.03.2010 21:00, schrieb Uriel Rozenbaum:
> Hi gentlemen,
>
> I'm having a bit of a hard time developing a bridge for media sessions.
>
> I have a box with 2 interfaces; eth0 has the private IP p.r.i.v and eth1
> has public IP p.u.b.l.
>
> When I receive a message in the private IP I try sending the call to a
> public proxy we have (p.u.b.2) using Carrierroute module but the source
> IP used is p.r.i.v. It is obvious that p.u.b.2 will not be able to route
> back messages.
>
> #
> U 192.168.200.11:5060 <http://192.168.200.11:5060> -> p.r.i.v:5060
> INVITE sip:1568767139 at p.r.i.v SIP/2.0.
> Via: SIP/2.0/UDP 192.168.200.11:5060;branch=z9hG4bK5d94bc09.
> From: "60911000" <sip:60911000 at p.r.i.v>;tag=as6d477d46.
> To: <sip:1568767139 at p.r.i.v>.
> Contact: <sip:60911000 at 192.168.200.11
> <mailto:sip%3A60911000 at 192.168.200.11>>.
> ...
>
> #
> U p.r.i.v:5060 -> p.u.b.2:5060
> INVITE sip:1568767139 at p.u.b.2 SIP/2.0.
> Record-Route: <sip:p.r.i.v;lr=on;ftag=as6d477d46>.
> Via: SIP/2.0/UDP p.r.i.v;branch=z9hG4bKf531.440788e1.0.
> Via: SIP/2.0/UDP
> 192.168.200.11:5060;rport=5060;received=192.168.200.11;branch=z9hG4bK5d94bc09.
> From: "60911000" <sip:60911000 at p.r.i.v>;tag=as6d477d46.
> To: <sip:1568767139 at p.r.i.v>.
> Contact: <sip:60911000 at 192.168.200.11
> <mailto:sip%3A60911000 at 192.168.200.11>>.
> ...
>
> I try then to set listen=0.0.0.0 so kamailio will be binded to all IPs
> but then the Route headers and Via use this 0.0.0.0
>
> #
> U 192.168.200.11:5060 <http://192.168.200.11:5060> -> p.r.i.v:5060
> INVITE sip:1568767139 at p.r.i.v SIP/2.0.
> Via: SIP/2.0/UDP 192.168.200.11:5060;branch=z9hG4bK14a00df7.
> From: "60911000" <sip:60911000 at p.r.i.v>;tag=as502405cf.
> To: <sip:1568767139 at p.r.i.v>.
> Contact: <sip:60911000 at 192.168.200.11
> <mailto:sip%3A60911000 at 192.168.200.11>>.
> ...
>
> #
> U p.u.b.l:5060 -> p.u.b.2:5060
> INVITE sip:1568767139 at p.u.b.2 SIP/2.0.
> Record-Route: <sip:0.0.0.0;lr=on;ftag=as502405cf>.
> Via: SIP/2.0/UDP 0.0.0.0;branch=z9hG4bK711b.8d28549.0.
> Via: SIP/2.0/UDP
> 192.168.200.11:5060;rport=5060;received=192.168.200.11;branch=z9hG4bK14a00df7.
> From: "60911000" <sip:60911000 at p.r.i.v>;tag=as502405cf.
> To: <sip:1568767139 at p.r.i.v>.
> Contact: <sip:60911000 at 192.168.200.11
> <mailto:sip%3A60911000 at 192.168.200.11>>.
> ...
>
> In this case the destination UA cannot return the call because it does
> not have a valid IP to do so.
>
> Is there any way to make Kamailio act in a different way? Like letting
> me modify the IP it will use for Via and Record-Route headers. Be aware
> that I'm supposed to do some kind of mirror for calls coming from
> outside the network (origin is public and destination is private).
>
> I'm sure I'll be asking some more on this same thread as I test.
>
> Thanks in advance!
> Uriel
>
>
>
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